The map above shows American Samoa and Guam side by side at exactly the same scale, using equal-area projections, so their true relative sizes are preserved.
American Samoa vs Guam Geography
Land area: American Samoa has a land area of 77 square miles (199 km²), while Guam has 210 square miles (544 km²). Guam's land area is 2.7 times (173%) larger than American Samoa's.
Total area: American Samoa: 581 square miles (1,505 km²) vs Guam: 210 square miles (544 km²), including inland and coastal water. American Samoa's total area is 2.8 times (177%) larger than Guam's.
Length: American Samoa is 9 miles (14 km) long from north to south; Guam is 27 miles (43 km). Guam's north-south length is 3.0 times (200%) longer than American Samoa's.
Width: American Samoa spans 17 miles (28 km) east to west; Guam spans 22 miles (35 km). Guam's east-west width is 1.3 times (29%) wider than American Samoa's.
Highest point: American Samoa's highest point is Lata Mountain at 3,169 feet (966 m); Guam's is Mount Lamlam at 1,332 feet (406 m). Lata Mountain is 1,837 feet higher than Mount Lamlam.
Lowest point: American Samoa's lowest point is Pacific Ocean at 0 feet; Guam's is Pacific Ocean at 0 feet. Both lowest points are at or near sea level.
American Samoa vs Guam Population and History
Population: American Samoa has a population of 49,710 (2020), while Guam has 153,836 (2020). Guam's population is 3.1 times (209%) larger than American Samoa's.
Population density: American Samoa: 645.6 people per square mile vs Guam: 732.6. Guam's population density is 1.1 times (13%) higher than American Samoa's.
History: American Samoa: A US territory since 1900. Guam: A US territory since 1898. In its current form, Guam is the older of the two by 2 years.
Official Websites
American Samoa official website · Guam official website
More Size Comparisons
All American Samoa size comparisons · All Guam size comparisons
Area, elevation and boundary figures come from official national statistics and US Census Bureau and Natural Earth boundary data; US state population, economic, county and tax figures come from the US Census Bureau, the Bureau of Economic Analysis and the Tax Foundation. Figures are rounded and for general reference.